Question

PLEASE HURRY 50 points There are three red, four blue, and three green marbles. What is the probability of selecting a blue marble first, replacing the marble, then selecting a green marble? Assume that each is equally likely to be chosen.

7/100
3/25
7/20
3/5

Answer 1

Here's an example to help guide you to answer this question dear.

Explanation:

A jar contains 10 red marbles, 4 white marbles, and 2 blue marbles. Two are drawn in sequence, not replacing after each draw.

Quantity A is greater.

Why?

Note that there are 16 total marbles. A is simply a set of sequential events. On the first, you have 10/16 chances to draw a red. Supposing this red is not replaced, the chance of drawing a second red will be 9/15; therefore, the probability of A is (10/16) * (9/15) = 0.375. Event B is translated into 2 events: Blue + (White or Red) or (White or Red) + Blue. The probabilities of each of these events, added together would be (2/16) * (14/15) + (14/16) * (2/15) = 0.2333333333; therefore, A is more probable.

Answer 2

1/13

Explanation:

the answer is up at the top